ceph/src/boost/libs/qvm/doc/accessing_quaternion_elements.html

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  14 <h1>QVM: Quaternions, Vectors, Matrices</h1>
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  16 <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
  17 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
  18 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
  19 <div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>Accessing Quaternion Elements</h3>
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  21 <div class="RenoIncludeDIV"><div class="RenoIncludeDIV"><p><span class="RenoEscape">&#35;<!--<wiki>`&#35;</wiki>--></span>include &lt;<span class="RenoLink"><a href="boost_qvm_quat_access_hpp.html">boost/qvm/quat_access.hpp</a></span>&gt;</p>
  22 <pre>namespace boost
  23 {
  24     namespace <span class="RenoLink"><a href="qvm.html">qvm</a></span>
  25     {
  26 <span class="RenoIncludeSPAN">        <span class="RenoIncludeSPAN">//Only <span class="RenoLink"><a href="SFINAE_enable_if.html">enabled if</a></span>:
  27         //  <span class="RenoLink"><a href="is_quat.html">is_quat</a></span>&lt;Q&gt;::value
  28
  29         template &lt;class Q&gt; -unspecified-return-type- <span class="RenoLink">S</span>( Q &amp; q );
  30         template &lt;class Q&gt; -unspecified-return-type- <span class="RenoLink">V</span>( Q &amp; q );
  31         template &lt;class Q&gt; -unspecified-return-type- <span class="RenoLink">X</span>( Q &amp; q );
  32         template &lt;class Q&gt; -unspecified-return-type- <span class="RenoLink">Y</span>( Q &amp; q );
  33         template &lt;class Q&gt; -unspecified-return-type- <span class="RenoLink">Z</span>( Q &amp; q );</span></span>
  34     }
  35 }</pre>
  36 </div></div><p>An expression of the form <i>S(q)</i> can be used to access the scalar component of the quaternion <i>q</i>. For example,</p>
  37 <pre>S(q) <span class="RenoLink"><a href="operator_mul_eq_quat_scalar_.html">*=</a></span> 42;</pre>
  38 <p>multiplies the scalar component of <i>q</i> by the scalar 42.</p>
  39 <p>An expression of the form <i>V(q)</i> can be used to access the vector component of the quaternion <i>q</i>. For example,</p>
  40 <pre>V(q) <span class="RenoLink"><a href="operator_mul_eq_quat_scalar_.html">*=</a></span> 42</pre>
  41 <p>multiplies the vector component of <i>q</i> by the scalar 42.</p>
  42 <p>The X, Y and Z elements of the vector component can also be accessed directly using <i>X(q)</i>, <i>Y(q)</i> and <i>Z(q)</i>.</p>
  43 </div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div>
  44 See also: <span class="RenoPageList"><a href="index.html">Boost QVM</a>&nbsp;| <a href="boost_qvm_quat_access_hpp.html">boost/qvm/quat_access.hpp</a>&nbsp;| <a href="Synopsis.html">Synopsis</a></span>
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  46 <!-- Copyright (c) 2008-2016 Emil Dotchevski and Reverge Studios, Inc. -->
  47 <!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
  48 <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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  53 <small>Copyright (c) 2008-2016 by Emil Dotchevski and Reverge Studios, Inc.<br/>
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